Low-clearance single-shaft extension rod cement mixing pile machine and construction method

Abstract

The invention relates to a low-clearance single-shaft connecting rod cement mixing pile machine and a construction method, and belongs to the technical field of mixing pile construction.The low-clearance single-shaft connecting rod cement mixing pile machine comprises a machine body, a winch and a base are arranged on the machine body, the base is slidably arranged on the machine body, the winch is used for driving a sliding base to slide on the machine body in the vertical direction, and a motor and a rotating joint are arranged on the base; the motor is fixed to the base and used for driving the rotating joint to rotate, the end, away from the motor, of the rotating joint is in threaded connection with a plurality of unit joints, the unit joints are in end-to-end threaded connection, the end of the unit joint at the farthest end is in threaded connection with the stirring joint, and the rotating joint, the unit joints and the stirring joint form a complete drill rod on the stirring pile machine. And a first dismounting assembly is arranged on the machine body and used for being matched with the motor and the winch to dismount or mount the unit joints, and the device has the effects that the situation that the construction site is limited is dealt with, and the stirring pile can be constructed as required.

Description

Technical Field

[0001] This application relates to the technical field of mixing pile construction, and particularly relates to a low-headroom single-shaft connecting rod cement mixing pile machine and a construction method thereof. Background Art

[0002] The cement-soil mixing pile is a method for strengthening saturated soft clay foundations. It uses cement as a curing agent and, through a special mixing machine, forcibly mixes the soft soil and the curing agent deep in the foundation. By means of a series of physical and chemical reactions between the curing agent and the soft soil, the soft soil is hardened into a high-quality foundation with integrity, water stability, and a certain strength.

[0003] Currently, the vertical height of the body of the mixing pile machine is generally relatively high so as to meet the requirement of mixing piles with sufficient depth during construction.

[0004] The inventor found during construction that when the construction site is restricted, such as when there are other buildings above the site or high-voltage lines above the construction site, there is a defect that the pile foundation of the mixing pile cannot be deployed. Summary of the Invention

[0005] In order to address the situation of restricted construction sites and enable the mixing piles to be constructed as scheduled, this application provides a low-headroom single-shaft connecting rod cement mixing pile machine and a construction method thereof.

[0006] In a first aspect, this application provides a low-headroom single-shaft connecting rod cement mixing pile machine and a construction method thereof, adopting the following technical solutions: A low-headroom single-shaft connecting rod cement mixing pile machine and a construction method thereof include a body, on which a winch and a base are provided. The base is slidably arranged on the body, and the winch is used to drive the sliding seat to slide vertically on the body. An electric motor and a rotating joint are provided on the base. The electric motor is fixed on the base and is used to drive the rotating joint to rotate. One end of the rotating joint away from the electric motor is threadedly connected with a unit joint. There are multiple unit joints, which are threadedly connected end to end. The end of the unit joint at the farthest end is threadedly connected with a mixing joint. The rotating joint, the unit joints, and the mixing joint form a complete drill rod on the mixing pile machine. A first disassembly component is provided on the body, and the first disassembly component is used to cooperate with the electric motor and the winch to disassemble or install the unit joints.

[0007] By adopting the above technical solutions, the winch is used to adjust the vertical height of the drill rod, lifting or lowering the entire drill rod. The electric motor is used to control the rotation or stop of the drill rod. The first disassembly component cooperates with the electric motor and the winch to disassemble or install the unit joints, thereby adjusting the overall length of the entire drill rod. When the net height of the construction working condition decreases, the length of the entire drill rod is adjusted by reducing the unit joints, so that the mixing pile machine can adapt to small-site construction, achieving the situation of restricted construction sites and enabling the mixing piles to be constructed as scheduled.

[0008] Optionally, the first disassembly assembly includes a hydraulic cylinder, a fixed plate, a first clamping plate, a second clamping plate and an electric cylinder, the hydraulic cylinder is horizontally fixed on the machine body, and the piston rod of the hydraulic cylinder moves in a direction away from or close to the drill pipe, the piston rod end of the hydraulic rod is fixed to the fixed plate, the first clamping plate and the second clamping plate are located on the side wall of the fixed plate away from the hydraulic cylinder, the second clamping plate and the electric cylinder are both fixedly connected to the fixed plate, and the electric cylinder is used to drive the first clamping plate to move away from or close to the first clamping plate.

[0009] By adopting the above technical solution, the hydraulic cylinder is started, and the hydraulic cylinder pushes the fixed plate to move toward the unit section until it abuts against the unit section, and then the electric cylinder is started to drive the first clamping plate to move toward the second clamping plate, and finally the first clamping plate and the second clamping plate clamp the unit tube section and fix it, and the motor is started, and the motor drives the rotating section to rotate in the opposite direction relative to the unit section, and the unit section is separated from the rotating section, completing the disassembly of the unit section, and similarly, the motor drives the rotating section to rotate forward relative to the unit section, and the unit section is threadedly connected to the rotating section, completing the installation of the unit section.

[0010] Optionally, the fixed plate, the first clamping plate and the second clamping plate form a C-shaped plate, and the C-shaped plate is provided with a chain, a slider and a sliding groove, one end of the chain is fixedly connected to the first clamping plate, and the other end is fixedly connected to the slider, the sliding groove is horizontally opened, the slider is located in the sliding groove and slides in the sliding groove, and a storage groove is opened at the bottom of the sliding groove, and the storage groove is used for storing the chain; a protrusion is fixed on the outer wall of the unit segment, the protrusion is hooked and connected to the slider, and a connecting component is provided between the slider and the C-shaped plate, and the connecting component is used to ensure that the slider always remains connected with the protrusion when it rotates with the protrusion.

[0011] By adopting the above technical solution, when the unit section is disassembled, the rotating section rotates in the opposite direction relative to the unit section, and the protrusion is hooked and connected with the slider, driving the slider to move, and the slider drives the chain to move. When it moves to the point where it cannot rotate, the chain is in a taut state. At this time, the chain pulls the first clamping plate to move toward the second clamping plate, and at the same time cooperates with the electric cylinder to drive the first clamping plate to move toward the second clamping plate. The double clamping makes the unit section more stably detached from the rotating section, and because the protrusion is located in the sliding groove, the unit section after detaching from the rotating section is suspended by the C-shaped plate, which is convenient for subsequent transportation.

[0012] Optionally, a receiving groove is provided at the top of the sliding groove, and the receiving groove is provided along the length direction of the sliding groove. The connecting component is located in the receiving groove, and the connecting component includes a spring and a limit block. One end of the spring is fixedly connected to the limit block, and the other end passes through the receiving groove and is fixedly connected to the top of the sliding block. The limit block slides in the receiving groove and cannot be separated from the receiving groove.

[0013] By adopting the above technical solution, when the unit section rotates, since the C-shaped plate is not circular, when the convex block rotates to a certain position, the convex block will pull the slider to move in the direction of separating from the sliding groove. At this time, the spring pulls the slider. When the convex block rotates to a position where the slider can fall back into the sliding groove, the spring ensures that the slider can be reset. And during the rotation of the unit section, the spring ensures that the convex block is always connected to the slider. The setting of the limiting block prevents the spring from slipping out of the receiving groove.

[0014] Optionally, a reset weight and a lead wire are arranged on the chain. One end of the lead wire is fixedly connected to the chain, and the other end is fixedly connected to the reset weight. The reset weight is located in the storage groove; when the chain is in a taut state, the reset weight still remains in the storage groove and is in a suspended state; when the chain slides into the storage groove, the reset weight falls to the bottom of the storage groove.

[0015] By adopting the above technical solution, the chain is in a taut state for the disassembly of the unit section. After the unit section is disassembled, rotate the unit section to relax the chain. At this time, the reset weight drops and pulls the chain to fall back into the storage groove through the lead wire, facilitating the next use of the chain.

[0016] Optionally, multiple groups of the lead wires and the reset weights are provided. Adjacent lead wires are arranged at intervals along the length direction of the chain. Guide grooves are formed on the vertical groove walls of the storage groove. The reset weights are located in the guide grooves, and the outer walls of the reset weights are in contact with the groove walls of the guide grooves.

[0017] By adopting the above technical solution, the setting of the guide grooves prevents adjacent reset weights from abutting against each other and adjacent lead wires from winding around each other, ensuring that the lead wires and the reset weights can fully exert the reset effect on the chain.

[0018] Optionally, a rotating seat is further arranged on the mixing pile driver. The rotating seat includes a rotating area and a non-rotating area. The rotating area of the rotating seat is used to drive the machine body to rotate horizontally relative to the crawler of the mixing pile driver itself; a second disassembly component is arranged on the rotating seat, and the second disassembly component is located in the non-rotating area of the rotating seat; the second disassembly component is used to cooperate with the motor to disassemble the connection between the unit section of the second section below the rotating section and the subsequent unit sections.

[0019] By adopting the above technical solution, after the connection between the unit section of the second section below the rotating section and the subsequent unit sections is disassembled, the rotating seat drives the machine body to rotate horizontally out. The first disassembly component cooperates with the motor to separate the unit section of the first section below the rotating section from the rotating section. The worker removes the disassembled unit section. The rotating seat drives the machine body to reset again. The motor drives the rotating section to be threadedly connected to the unit section on the second disassembly component. Then the winch lifts the drill rod, and repeats the disassembly operation again, and the entire drill rod can be disassembled section by section.

[0020] Optionally, a support rod is provided on the rotating seat. One end of the support rod is fixedly connected to the non-rotating area, and the other end abuts against the second disassembly component. The support rod is used to support the second disassembly component.

[0021] By adopting the above technical solution, after the rotating seat drives the machine body to rotate horizontally, the second disassembly component suspends the clamped unit section and the part of the drill pipe below it, and the support rod strengthens the supporting ability of the second disassembly component.

[0022] Optionally, bumps are provided on the side walls at both ends of the unit section.

[0023] By adopting the above technical solution, bumps are provided at both ends of the unit section, so that the distance between the first disassembly component and the second disassembly component after being fixed on the mixing pile machine can be shortened, saving the floor area.

[0024] In a second aspect, the present application provides a low-clearance single-shaft jointed cement mixing pile machine and a construction method, adopting the following technical solutions: A construction method of a low-clearance single-shaft jointed cement mixing pile machine includes the following steps: S1. The mixing pile machine moves to a designated position, the rotating section and the motor are both fixed on the base, and the rotating shafts of the rotating section and the motor are connected; S2. The rotating section and the mixing section are connected end to end to form a drill pipe with the minimum distance; S3. Start drilling the mixing pile position; S4. When it is necessary to add a unit section, the rotating section and the mixing section are separated through the first disassembly component, and then the unit section is added. During this period, the winch is used to raise and lower the rotating section; S5. When it is necessary to disassemble the unit section, the first disassembly component and the second disassembly component cooperate with each other to complete the gradual disassembly of the unit section.

[0025] By adopting the above technical solution, the disassembly and installation of the unit section enable the mixing pile machine to operate in a low-clearance environment, so as to adapt to more working sites and ensure the construction period.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The winch is used to adjust the vertical height of the drill pipe, lift or lower the entire drill pipe, and the motor is used to control the rotation or stop of the drill pipe. The first disassembly component cooperates with the motor and the winch to disassemble or install the unit section, so as to adjust the overall length of the entire drill pipe. When the net height of the construction condition decreases, the length of the entire drill pipe is adjusted by reducing the unit section, so that the mixing pile machine can adapt to small-site construction, meet the situation of limited construction sites, and enable the mixing pile to be constructed as scheduled; 2. The cooperation between the chain and the slider with the convex block enables the chain to pull the first clamping plate to move towards the second clamping plate, and at the same time, it cooperates with the electric cylinder to drive the first clamping plate to move towards the second clamping plate. The double clamping makes the unit section more stable to disengage from the rotating section. And because the convex block is located in the sliding groove, the unit section after disengaging from the rotating section is suspended by the C-shaped plate, which is convenient for subsequent transportation. Brief Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of an embodiment of the present application; Figure 2 is a schematic diagram of a partial structure highlighting the first disassembly component; Figure 3 is a schematic diagram of a partial structure highlighting the accommodation groove; Figure 4 is a schematic diagram of a partial structure highlighting the chain; Figure 5 is a schematic diagram of the position where the support rod is located.

[0028] Description of the reference numerals: 1, body; 11, winch; 12, base; 13, motor; 14, rotating section; 2, unit section; 21, mixing section; 3, first disassembly component; 31, hydraulic cylinder; 32, fixing plate; 321, long hole; 322, strip plate; 33, first clamping plate; 34, second clamping plate; 35, electric cylinder; 4, chain; 41, slider; 42, sliding groove; 43, storage groove; 44, accommodation groove; 5, convex block; 6, connection component; 61, limiting block; 62, spring; 7, lead wire; 71, reset weight; 8, guide groove; 9, rotating seat; 91, second disassembly component; 93, support rod. Detailed Description of the Embodiment

[0029] The following will further describe the present application in detail Figures 1-5 with reference to the attached drawings.

[0030] An embodiment of the present application discloses a low-headroom single-shaft connecting rod cement mixing pile machine.

[0031] Refer to Figure 1, a low headroom single-shaft connecting rod cement mixing pile driver includes a rotating seat 9 and a machine body 1. The rotating seat 9 is fixed on the top of the crawler of the mixing pile driver itself. The rotating seat 9 includes a rotating area and a non-rotating area. The machine body 1 is fixed on the rotating area. A base 12 is slidably arranged on the machine body 1. The base 12 slides in the vertical direction. A motor 13 is fixed on the base 12. A stirring section 21 is fixed on the rotating shaft of the motor 13. The stirring section 21 rotates relative to the base 12. A unit section 2 is threadedly connected to the end of the stirring section 21 away from the motor 13. A winch 11 and a first disassembly component 3 are also arranged on the machine body 1. The winding end of the winch 11 is fixedly connected to the base 12. The winch 11 is used to pull the base 12 to slide in the vertical direction. The first disassembly component 3 is used to cooperate with the motor 13 to realize the installation and disassembly of the stirring section 21 and the unit section 2.

[0032] Reference Figure 1 , a unit section 2 is threadedly connected below the stirring section 21. The rotating section 14 and the stirring section 21 are connected to form a drill pipe. At this time, it is the minimum length of the drill pipe. According to the engineering needs, multiple unit sections 2 are added between the rotating section 14 and the stirring section 21 to meet the engineering requirements.

[0033] Reference Figure 2 and Figure 3 , the first disassembly component 3 includes a hydraulic cylinder 31, a fixing plate 32, a first clamping plate 33, a second clamping plate 34 and an electric cylinder 35. The hydraulic cylinder 31 is horizontally fixed on the machine body 1. The end of the hydraulic cylinder 31 is fixedly connected to the fixing plate 32. The first clamping plate 33 and the second clamping plate 34 are located on the same side wall of the fixing plate 32 and are both on the side wall away from the hydraulic cylinder 31. The second clamping plate 34 is fixedly connected to the fixing plate 32. The second clamping plate 34 is perpendicular to the fixing plate 32. The electric cylinder 35 is fixed on the fixing plate 32 and is on the same side of the fixing plate 32 as the hydraulic cylinder 31. A long strip hole 321 is opened on the fixing plate 32. The long strip hole 321 is horizontally opened along the connection line direction of the first clamping plate 33 and the second clamping plate 34. A strip plate 322 is fixed on the first clamping plate 33. The end of the strip plate 322 penetrates through the long strip hole 321. The piston rod of the electric cylinder 35 is fixedly connected to the strip plate 322. The electric cylinder 35 drives the first clamping plate 33 to move towards or away from the second clamping plate 34. The fixing plate 32, the first clamping plate 33 and the second clamping plate 34 form a C-shaped plate. The internal space of the C-shaped plate is used to clamp the unit section 2.

[0034] Reference Figure 1 、 Figure 3 and Figure 4The C-shaped plate is provided with a chain 4 and a slider 41. The C-shaped plate is provided with a sliding groove 42, which is horizontally provided. The starting end of the sliding groove 42 starts from the first clamping plate 33, and the end is located on the second clamping plate 34 after passing through the fixed plate 32. Both ends of the sliding groove 42 are connected to the outside. A receiving groove 43 is provided at the bottom of the sliding groove 42. One end of the chain 4 is fixedly connected to the first clamping plate 33, and the other end is fixedly connected to the slider 41. The slider 41 slides in the sliding groove 42 and does not fall into the receiving groove 43. The receiving groove 43 is used to receive the chain 4. The chain 4 is fixedly connected with a lead wire 7, and the end of the lead wire 7 away from the chain 4 is fixedly connected with a reset pendant 71. A guide groove 8 is provided on the vertical groove wall of the receiving groove 43, and the reset pendant 71 is located in the guide groove 8. The outer wall of the reset pendant 71 abuts against the inner wall of the guide groove 8. The outer wall at the end of the unit section 2 is provided with a protrusion 5. When the unit section 2 is located between the C-shaped plates, the protrusion 5 is located in the sliding groove 42. When the unit section 2 rotates, the protrusion 5 moves in the sliding groove 42, and the protrusion 5 is hooked and fixed with the slider 41. In this embodiment, the slider 41 can be adopted The protrusion 5 can also be in the shape of a hook, so that the protrusion 5 is convenient for hooking and fixing with the slider 41. The rotating protrusion 5 drives the slider 41 to move from the first clamping plate 33 to the second clamping plate 34, and the chain 4 slides out of the storage groove 43 and is wrapped around the unit section 2. The chain 4 is tightened. At this time, the chain 4 pulls the first clamping plate 33 to move toward the second clamping plate 34, and at the same time cooperates with the electric cylinder 35 to drive the first clamping plate 33 to move toward the second clamping plate 34. Double clamping makes the unit section 2 more stably detached from the rotating section 14.

[0035] refer to Figure 3 and Figure 4 , the chain 4 is in a taut state, the reset pendant 71 is still in the storage groove 43 and the reset pendant 71 is in a suspended state; when the chain 4 slides into the storage groove 43, the reset pendant 71 falls to the bottom of the storage groove 43. The chain 4 is in a taut state for disassembling the unit section 2. After the unit section 2 is disassembled, the unit section 2 is rotated to relax the chain 4. At this time, the reset pendant 71 falls and pulls the chain 4 back into the storage groove 43 through the lead wire 7, which is convenient for the next use of the chain 4. The lead wire 7 and the reset pendant 71 can be provided in multiple numbers, a single lead wire 7 and a single reset pendant 71 are a group, and adjacent groups are arranged at intervals along the length direction of the chain 4. The opening of the guide groove 8 allows a single reset pendant 71 to be located in a single guide groove 8, thereby avoiding the entanglement of adjacent lead wires 7.

[0036] refer to Figure 3 and Figure 4When the unit segment 2 rotates, since the C-shaped plate is not circular, the protrusion 5 will pull the slider 41 to move in the direction of disengaging from the sliding groove 42 when the protrusion 5 rotates to a certain position, and a connecting component 6 is provided on the C-shaped plate. The connecting component 6 is used for the slider 41 to return to the sliding groove 42 after being free from external force, so as to facilitate the hooking and fixing of the protrusion 5 and the slider 41 next time. A receiving groove 44 is provided at the top of the sliding groove 42, and the receiving groove 44 is provided along the length direction of the sliding groove 42. The connecting component 6 is located in the receiving groove 44. The connecting component 6 includes a spring 62 and a limit block 61. The limit block 61 slides in the receiving groove 44 and cannot be separated from the receiving groove 44. In this embodiment, the internal space of the receiving groove 44 can be enlarged, so that the connection between the receiving groove 44 and the sliding groove 42 becomes relatively smaller, so as to achieve a state in which the limit block 61 slides in the receiving groove 44 and cannot be separated from the receiving groove 44. One end of the spring 62 is fixedly connected to the limit block 61, and the other end is fixedly connected to the slider 41.

[0037] refer to Figure 1 and Figure 5 A second disassembly component 91 and a support rod 93 are fixed on the non-rotating area of the rotating seat 9. The structure included in the second disassembly component 91 is exactly the same as the structure included in the first disassembly component 3. The support rod 93 is tilted, one end of the support rod 93 is fixedly connected to the non-rotating area, and the other end abuts against the bottom of the piston rod of the hydraulic cylinder 31 in the second disassembly component 91. The tilt direction of the support rod 93 is tilted upward in the direction away from the rotating seat 9.

[0038] refer to Figure 1 When the rotating joint 14 is located in the C-shaped plate, the protrusion 5 at the bottom of the rotating joint 14 located above is located in the first disassembly component 3, and the protrusion 5 at the top of the rotating joint 14 located below is located in the second disassembly component 91.

[0039] The embodiment of the present application also discloses a construction method of a low-headroom single-shaft connecting rod cement mixing pile machine.

[0040] The following steps are involved: S1, the pile mixing machine is moved to a designated position, the rotating joint 14 and the motor 13 are fixed on the base 12, and the rotating joint 14 is connected to the rotating shaft of the motor 13; S2, connecting the rotating section 14 and the stirring section 21 end to end to form a minimum distance drill rod; S3, start drilling the mixing pile position; S4. When it is necessary to add the unit section 2, the rotating section 14 is disengaged from the stirring section 21 through the first disassembly component 3, and then the unit section 2 is added. During this period, the hoist 11 is used to raise and lower the rotating section 14; a convex block 5 is also fixed at the end of the stirring section 21. When the stirring section 21 is disassembled, the rotating section 14 rotates reversely relative to the stirring section 21, and the convex block 5 is hooked and connected with the slider 41, driving the slider 41 to move. The slider 41 drives the chain 4 to move. When it cannot rotate anymore, it is the state where the chain 4 is tightened. At this time, the chain 4 pulls the first clamping plate 33 to move towards the second clamping plate 34. At the same time, the electric cylinder 35 is used to drive the first clamping plate 33 to move towards the second clamping plate 34. With double clamping, the stirring section 21 can be disengaged from the rotating section 14 more stably. And because the convex block 5 is located in the sliding groove 42, the stirring section 21 after disengaging from the rotating section 14 is suspended by the C-shaped plate. Then the hoist 11 lifts the rotating section 14, and the worker places the new unit section 2 between the rotating section 14 and the stirring section 21. The motor 13 rotates to thread-connect the rotating section 14, the unit section 2, and the stirring section 21 again.

[0041] S5. When it is necessary to disassemble the unit section 2, the first disassembly component 3 and the second disassembly component 91 cooperate with each other to complete the gradual disassembly of the unit section 2; the second disassembly component 91 first cooperates with the motor 13 to disassemble the connection between the unit section 2 of the second section below the rotating section 14 and the subsequent unit sections 2. Then the rotating seat 9 drives the machine body 1 to rotate out horizontally. The first disassembly component 3 cooperates with the motor 13 to separate the unit section 2 of the first section below the rotating section 14 from the rotating section 14. The worker removes the disassembled unit section 2. The rotating seat 9 drives the machine body 1 to reset again. The motor 13 drives the rotating section 14 to be thread-connected with the unit section 2 on the second disassembly component 91. Then the hoist 11 lifts the drill pipe, and the disassembly action is repeated again, and the entire drill pipe can be disassembled section by section.

[0042] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A low headroom single-shaft connecting rod cement mixing pile machine and construction method, characterized in that: The invention comprises a machine body (1), wherein a winch (11) and a base (12) are arranged on the machine body (1), wherein the base (12) is slidably arranged on the machine body (1), wherein the winch (11) is used to drive a slide seat to slide on the machine body (1) in a vertical direction, wherein a motor (13) and a rotating joint (14) are arranged on the base (12), wherein the motor (13) is fixed on the base (12) and is used to drive the rotating joint (14) to rotate, wherein the rotating joint (14) is threadedly connected with a unit section (2) at one end away from the motor (13), wherein the unit section (2) is provided with a plurality of threads which are threadedly connected end to end, wherein the end of the unit section (2) at the farthest end is threadedly connected with a stirring section (21), and the rotating section (14), the unit section (2) and the stirring section (21) constitute a complete drill rod on the mixing pile machine; and wherein a first disassembly component (3) is arranged on the machine body (1), wherein the first disassembly component (3) is used to cooperate with the motor (13) and the winch (11) to disassemble or install the unit section (2).

2. The low headroom single-shaft connecting rod cement mixing pile machine and construction method according to claim 1, characterized in that: The first disassembly assembly (3) comprises a hydraulic cylinder (31), a fixed plate (32), a first clamping plate (33), a second clamping plate (34) and an electric cylinder (35); the hydraulic cylinder (31) is horizontally fixed on the machine body (1); and a piston rod of the hydraulic cylinder (31) moves in a direction away from or close to the drill pipe; the piston rod end of the hydraulic rod is fixed to the fixed plate (32); the first clamping plate (33) and the second clamping plate (34) are located on a side wall of the fixed plate (32) away from the hydraulic cylinder (31); the second clamping plate (34) and the electric cylinder (35) are both fixedly connected to the fixed plate (32); and the electric cylinder (35) is used to drive the first clamping plate (33) to move in a direction away from or close to the first clamping plate (33).

3. A low headroom single-shaft connecting rod cement mixing pile rig and construction method according to claim 2, characterized in that: The fixed plate (32), the first clamping plate (33) and the second clamping plate (34) form a C-shaped plate, on which a chain (4), a slider (41) and a sliding groove (42) are arranged. One end of the chain (4) is fixedly connected to the first clamping plate (33), and the other end is fixedly connected to the slider (41). The sliding groove (42) is horizontally opened. The slider (41) is located in the sliding groove (42) and slides in the sliding groove (42). A receiving groove (43) is opened at the bottom of the sliding groove (42). The receiving groove (43) is used to receive the chain (4); a convex block (5) is fixed on the outer wall of the unit section (2). The convex block (5) is hooked and connected to the slider (41). A connecting component (6) is arranged between the slider (41) and the C-shaped plate. The connecting component (6) is used to ensure that the slider (41) always keeps a connection with the convex block (5) when the slider (41) rotates following the convex block (5).

4. A low headroom single-shaft connecting rod cement mixing pile machine and construction method according to claim 3, characterized in that: The top of the sliding groove (42) is provided with a receiving groove (44), the receiving groove (44) is provided along the length direction of the sliding groove (42), the connecting component (6) is located in the receiving groove (44), the connecting component (6) comprises a spring (62) and a limit block (61), one end of the spring (62) is fixedly connected to the limit block (61), and the other end of the spring (62) passes through the receiving groove (44) and is fixedly connected to the top of the sliding block (41), and the limit block (61) slides in the receiving groove (44) and cannot be separated from the receiving groove (44).

5. A low-headroom single-shaft connecting rod cement mixing pile machine and construction method according to claim 3, characterized in that: A reset weight (71) and a lead wire (7) are provided on the chain (4). One end of the lead wire (7) is fixedly connected to the chain (4), and the other end is fixedly connected to the reset weight (71). The reset weight (71) is located in the storage groove (43). When the chain (4) is in a taut state, the reset weight (71) still remains in the storage groove (43) and the reset weight (71) is in a suspended state. When the chain (4) slides into the storage groove (43), the reset weight (71) falls to the bottom of the storage groove (43).

6. A low headroom single-shaft connecting rod cement mixing pile machine and construction method according to claim 5, characterized in that: Multiple groups of the lead wire (7) and the reset weight (71) are provided. Adjacent lead wires (7) are arranged at intervals along the length direction of the chain (4). A guide groove (8) is formed on the vertical groove wall of the storage groove (43). The reset weight (71) is located in the guide groove (8), and the outer wall of the reset weight (71) abuts against the groove wall of the guide groove (8).

7. A low-headroom single-shaft connecting rod cement mixing pile machine and construction method according to claim 2, characterized in that: A rotating seat (9) is further provided on the mixing pile machine. The rotating seat (9) includes a rotating area and a non-rotating area. The rotating area of the rotating seat (9) is used to drive the machine body (1) to horizontally rotate relative to the crawler of the mixing pile machine itself. A second disassembly component (91) is provided on the rotating seat (9). The second disassembly component (91) is located in the non-rotating area of the rotating seat (9). The second disassembly component (91) is used to cooperate with the motor (13) to disassemble the connection between the unit section (2) of the second section below the rotating joint (14) and the subsequent unit section (2).

8. A low-headroom single-shaft connecting rod cement mixing pile rig and construction method according to claim 7, characterized in that: A support rod (93) is provided on the rotating seat (9). One end of the support rod (93) is fixedly connected to the non-rotating area, and the other end abuts against the second disassembly component (91). The support rod (93) is used to support the second disassembly component (91).

9. A low-headroom single-shaft connecting rod cement mixing pile machine and construction method according to claim 7, characterized in that: Convex blocks (5) are provided on the side walls at both ends of the unit section (2).

10. A construction method of a low headroom single-shaft connecting rod cement mixing pile machine according to any one of claims 1-9, characterized in that: It includes the following steps: S1. The mixing pile machine moves to a designated position. The rotating joint (14) and the motor (13) are both fixed on the base (12), and the rotating shafts of the rotating joint (14) and the motor (13) are connected. S2. The rotating joint (14) and the mixing section (21) are connected end to end to form a drill rod with the minimum distance. S3. Start drilling the mixing pile position. S4. When it is necessary to add a unit section (2), the rotating joint (14) and the mixing section (21) are separated by the first disassembly component (3), and then a unit section (2) is added. During this period, the hoist (11) is used to raise and lower the rotating joint (14). S5. When it is necessary to disassemble the unit section (2), the first disassembly component (3) and the second disassembly component (91) cooperate with each other to complete the gradual disassembly of the unit section (2).

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